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Neves TA, Dos Santos WLA, Duarte MM, Neves CA, Batista JS, da Silva Teófilo T, Dos Santos Rebouças L, Lima AKF, Dias FEF, Arrivabene M, Cavalcante TV. Bilateral testicular myxosarcoma in a cryptorchid dog. Res Vet Sci 2024; 174:105308. [PMID: 38788298 DOI: 10.1016/j.rvsc.2024.105308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 05/09/2024] [Accepted: 05/13/2024] [Indexed: 05/26/2024]
Abstract
Myxosarcoma is a rare malignant mesenchymal neoplasm of soft tissues originating from fibroblasts. This report describes a case of bilateral myxosarcoma in a three-year-old cryptorchid dog. The animal was referred to the veterinary clinic because of the absence of testicles in the scrotum. Ultrasonography revealed two masses in the abdominal cavity with testicular echotexture. Exploratory laparotomy revealed the presence of cryptorchid testicles, and orchiectomy was recommended to treat the animal. Testicles were gray and reddish in color and enlarged with firm consistency. For histopathological analysis, testis fragments were fixed in 10% formalin and stained with hematoxylin and eosin and Alcian blue. Immunohistochemistry was performed using the following primary antibodies:1A4, HHF35, desmin, glial fibrillary acidic protein, CD31, S-100, vimentin, and Ki-67. Histopathological evaluation revealed the proliferation of fusiform and round cells associated with extensive areas of myxoid matrix. Neoplasms featured multinucleated giant cells, pleomorphism, karyomegaly, nuclear hyperchromasia, anisokaryosis, mitoses, and necrosis, with coarse chromatin and prominent nucleoli. Immunohistochemical analysis of vimentin- and the Alcian blue-positive cells confirmed the diagnosis of myxosarcoma. A high mitotic count and Ki-67 proliferative index suggests this myxosarcoma had a high degree of malignancy. To the best of our knowledge, this is the first case report of bilateral testicular myxosarcoma in a cryptorchid animal.
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Affiliation(s)
| | | | - Marlos Melo Duarte
- Center for Agricultural Sciences, Federal University of Piauí, Teresina, Piauí, Brazil
| | | | - Jael Soraes Batista
- Center for Agricultural Sciences, Federal Rural University of the Semiarid, Mossoró, Rio Grande do Norte, Brazil
| | - Tiago da Silva Teófilo
- Center for Agricultural Sciences, Federal Rural University of the Semiarid, Mossoró, Rio Grande do Norte, Brazil.
| | - Lucas Dos Santos Rebouças
- Center for Agricultural Sciences, Federal Rural University of the Semiarid, Mossoró, Rio Grande do Norte, Brazil
| | - Ana Kelen Felipe Lima
- School of Veterinary Medicine and Animal Science, Federal University of Northern Tocantins, Araguína, Tocantins, Brazil
| | - Francisca Elda Ferreira Dias
- School of Veterinary Medicine and Animal Science, Federal University of Northern Tocantins, Araguína, Tocantins, Brazil
| | - Mônica Arrivabene
- Center for Agricultural Sciences, Federal University of Piauí, Teresina, Piauí, Brazil
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Hixson H, Coutermarsh‐Ott S, Ciepluch B, Kierski K, Lahmers K, Tuohy J. Retroperitoneal myxosarcoma in a cat. Clin Case Rep 2022; 10:e6063. [PMID: 35846922 PMCID: PMC9280748 DOI: 10.1002/ccr3.6063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 04/29/2022] [Accepted: 07/02/2022] [Indexed: 11/07/2022] Open
Abstract
This report details a retroperitoneal myxosarcoma in a cat that exhibited extremely aggressive biological behavior. An exploratory midline celiotomy revealed a left‐sided retroperitoneal mass firmly adhered to the hypaxial musculature. Histopathological evaluation identified the mass as a myxosarcoma. Following surgical excision, the mass rapidly recurred within 6 weeks after surgery.
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Affiliation(s)
- Haleigh Hixson
- Virginia‐Maryland College of Veterinary Medicine Blacksburg Virginia USA
| | - Sheryl Coutermarsh‐Ott
- Department of Biomedical Sciences and Pathobiology Virginia‐Maryland College of Veterinary Medicine Blacksburg Virginia USA
| | - Brittany Ciepluch
- Department of Small Animal Clinical Sciences Virginia‐Maryland College of Veterinary Medicine Blacksburg Virginia USA
| | - Katharine Kierski
- Department of Small Animal Clinical Sciences Virginia‐Maryland College of Veterinary Medicine Blacksburg Virginia USA
- College of Veterinary Medicine Cornell University New York USA
| | - Kevin Lahmers
- Department of Small Animal Clinical Sciences Virginia‐Maryland College of Veterinary Medicine Blacksburg Virginia USA
| | - Joanne Tuohy
- Department of Small Animal Clinical Sciences Virginia‐Maryland College of Veterinary Medicine Blacksburg Virginia USA
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